MT20RNL Adapter for Makita 18V Battery to for Roybi 18V Battery,Most Batteries for MAKITA:BL1860B / BL1860 / BL1850B / BL1850 / BL1840 / BL1830B / BL1830 / BL1820 / BL1815 etc. - - Amazon.com
Battery Adapter for Makita 18V Battery, ADP05 Power Source Charger with LED Work Light & 1 PD USB-C & 1 USB Ports, Powered by Makita Lithium-ion Battery (Tool ONLY) : Tools & Home Improvement - Amazon.com